Adhesive applying device

ABSTRACT

A device for applying adhesive to a shoe bottom through a groove closed at one end by a member biased out of the groove and depressible by engagement with the shoe bottom to adjust the length of the groove according to the size of shoe being operated upon.

O United States Patent [1113,570,454 [72] I Inventor George C. Barton [56] References Cited Leicester, England UNITED STATES PATENTS 25g- 3 32 1,939,578 12/1933 Sullivan 15/307 ,422,797 1 19 9 B k 4 4s Patented Mar. 16,1971 3 6 cc 1 18/ H [73 Assignee USM corporation Primary Examiner-John P. McIntosh Remington Att0rneys-W. Blgelow Hall, Richard A. Wise and Vincent A. 32] Priority May 10, 1968 Whfie [33] Great Britain [31] 22176/68 [54] ADHESIVE APPLYING DEVICE 4 Chums 3 Drawing Figs ABSTRACT: A device for applying adhesive to a shoe bottom [52] US. Cl 118/411 through a groove closed at one end by a member biased out of [51] Int. Cl v 1305c 3/02 the groove and depressible by engagement with the shoe bot- [50] Field of Search 1 18/410, tom to adjust the length of the groove according to the size of 411; 15/307 shoe being operated upon.

Patented March 16, 1971 I Inventor George C. Barzon By his Azio-rney ADHESIVE APPLYING DEVICE BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to shoe lasting machines and particularly to improved means for applying adhesive to insole bottoms for attaching the margins of lasted uppers.

2. Description of the Prior Art it is ltnown to secure portions of lasted shoe uppers to the bottom of insoles by adhesive which is applied to the margin of an insole during a lasting operation in which an upper is wiped heightwise of the last and inwardly over the insole bottom. One machine having an adhesive applying device for performing such an operation is shown in U.S.Pat. No. 3,422,797 granted in the name of Karl V. Becker. Such a device includes a nozzle having a groove extending along the margin of the toe end of the insole for applying adhesive on the insole bottom only to the tip line of the shoe where the contours of shoes of various styles and sizes do not vary to any great extent. It would be possible to provide a nozzle such as shown in the Becker patent which extended heelwardly to the ball area of the shoe, but due to the great variation in sizes and shapes in that area it would be necessary to change such a nozzle whenever a different size and/or style shoe was to be operated upon.

Recognizing this problem, the nozzle of the Becker patent had added thereto a pair of adjustable nozzles which extend heelwardly from the nozzle to the ball line of the shoe. This is shown in U.S. application Ser. No. 733,573, filed May 31, 1968 in the name of Gerald Marquis. These nozzles were long enough to extend to the ball line of the longest shoe which would be operated on. Since the open groove through which adhesive is extruded would extend beyond the ball line of the shortest shoe to be encountered, the heelward ends of the noz zles were provided with a plurality of valves which were opened to permit extrusion of adhesive only if the shoe bottom engaged the nozzles. Thus, for a small size shoe, outlets at the heel ends of the nozzles would not be opened while for a large size shoe such outlets would be opened by engagement of the insole to permit extrusion of adhesive onto the insole bottom.

SUMMARY OF THE INVENTION One of the above-identified nozzles is useful only to apply adhesive to abut the tip line of the insole bottom while the other does apply adhesive back to the ball line but involves relatively expensive and complex mechanism. Accordingly, it is an object of the invention to provide an improved nozzle which is capable of applying adhesive to an insole bottom along the margin of the generally flat forepart of the insole heelwardly to the ball line.

To this end the machine of the present invention is provided with a nozzle generally similar to that disclosed in the Becker patent, but which has an adhesive extrusion groove which is long enough to extend to the ball line of a large size shoe. The heelward end of the groove is provided with a member closing the end of the groove variably at the ball line according to the size of shoe being operated upon. Thus, a very simple nozzle is provided which will apply adhesive to a wide size range of right and left shoes avoiding wastage of adhesive and fouling of machine parts by overflowing adhesive.

The above and other objects and features of the invention together with novel details of construction will now be described with particular reference to the embodiment shown in the drawings and thereafter pointed out in the claims.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a perspective view of an adhesive applying nozzle embodying the present invention;

FIG. 2 is a section taken at the heel end of the nozzle showing a specific construction of an adhesive extrusion groove closing means; and

FIG. 3 is a plan view showing a right-hand insole on the nozzle with a left-hand insole superposed thereon to illustrate closure of the nozzle groove.

Typical shoe lasting machines with which the present adhesive applying nozzle may be used are shown in U.S. Pat. No. 3,099,846 granted in the name of Lane et al. and in U.S. Pat. No. 3,164,852 granted in the name of Bowler et al. Both machines are adapted to last the forepart of a shoe to at least the ball area and to secure the margin of the lasted upper to the insole by adhesive applied to the insole bottom. In the Lane et al. and Bowler et al. machines the adhesive is preapplied to the insole before insertion of the shoe in the machine. The Becker patent shows a nozzle added to a machine similar to that of the Bowler patent for applying adhesive to the insole in the machine during a lasting operation.

The shoe support, upper grippers and .wiper arrangements used in such machines are commonly known and therefore are not described hereimor shown in the drawings since they do not form an essential part of the present invention. It should be sufficient for an understanding of the present invention to state that the nozzle 5 indicated generally in FIG. 1 hereof is generally similar to that indicated by the reference numeral 30 in FIG. 1 of the Becker patent and is mounted for heightwise movement into engagement with an insole of a shoe supported in the machine.

The illustrative nozzle 5 has an outline shape generally similar to that of the foreparts of a range of shoes with which the nozzle is intended to be used and is provided with an open composite groove comprising portions 7 and 8 in the upper face of the member. The groove extends around peripheral portions of the upper face of the member as shown in FIG. 1 and extends heelwardly at least to the ball line of the largest size shoe to which adhesive is to be applied. Adhesive is pumped at an appropriate time during the cycle of operations of the machine into the composite groove 7 and-8 through a plurality of supply passages 9. The arrangement of supply passages 9 gives the desired distribution of adhesive around the marginal portions of the forepart of the insole of the shoe being operated upon. It should be apparent that the nozzle may be used to apply any type of adhesive in a liquid state including molten thermoplastic cement.

l'leelward end portions 8 of the groove are provided with resilient striplike members 11, of a width commensurate with that of the groove so as to close the open heelward ends of the groove portions 8. Toeward ends of the members 11 are secured against the bottom surface of the groove, as at 13 as seen in FIGS. 1 and 2. The members extend heelwardly along the groove portions 8 and curve upwardly out of the grooves at an angle so as to be engaged by the insole bottom of a shoe resting on the nozzle. In this manner the members lll form sealsagainst the insole at the ball line and effectively define the heelward ends of the region over which adhesive is applied to the insole from the groove. A reference to FIG. 3 indicates how the left-hand member ll seats against the sharply curved portion at the left side of an insole of a right shoe (shown in solid lines) to close the left-hand groove 8 short of its heelward end to prevent adhesive flowing therepast. In the case of operation on a left shoe conditions are reversed as shown in superposed dotted lines on FIG. 3 and the member Ill at the right-hand side of the nozzle seals against the edge of the insole. If the shoe being operated upon is of a sufficiently large size the heelward ends of both grooves 8 may be fully covered by the insole and the members 11 at both sides may then be deflected into the groove with only the heelward end of the member in engagement with the insole so that adhesive is extruded along the full length of the groove.

By reason of the provision of the resilient members 11 the groove is made self-accommodating to a considerable range of sizes, and styles of both right and left shoes so that adhesive may be applied by a single grooved nozzle to regions nearer the ball region of the forepart than is the case when using an applying member having a plain groove of the form described in said Becker patent.

It should be obvious that the foregoing is intended to describe only one preferred embodiment of the invention and that the nozzle described is suitable to apply a wide variety of adhesives supplied in a number of ways. Furthermore substitutions may be made for a variety of means to close the end of the nozzle groove without departing from the scope of the invention as set forth in the following claims.

lclaim:

1. in a machine for lasting shoes in which the margin of a lasted shoe upper is secured to the bottom of an insole by adhesive applied along the margin of the generally flat forepart of the insole bottom, a nozzle engageable with the insole bottom and having a groove extending along said margin and through which adhesive is extruded, an elongate member closing the heelward end of said groove and biased out of the groove at an angle extending heightwise and heelwardly of the insole bottom, said member being depressed into said groove by the insole upon engagement with the nozzle whereby the length of the groove through which adhesive is extruded is varied according to the size of the shoe being operated upon.

2. A machine according to claim 1 in which the nozzle is provided with a groove which extends heelwardly beyond the ball area of the insole bottom where the generally flat forepart curves heightwise toward the heel end of the shoe and depression of said member by the insole closes the heelward end of said groove at said ball area.

3. A machine according to claim I in which the nozzle is provided with a groove which extends around the forepart of the insole and heelwardly beyond the ball area at opposite sides of the insole and elongate members are provided in the heelward ends of the groove whereby depression of said members into said groove by the insole closes the heelward ends of said groove at said ball area where the generally flat forepart of the insole curves heightwise toward the heel end of the shoe.

4. A machine according to claim 1 in which the elongate member comprises a resilient strip secured at one end to the bottom of the groove and having the other end extending heightwise and heelwardly out of the open side of the groove. 

1. In a machine for lasting shoes in which the margin of a lasted shoe upper is secured to the bottom of an insole by adhesive applied along the margin of the generally flat forepart of the insole bottom, a nozzle engageable with the insole bottom and having a groove extending along said margin and through which adhesive is extruded, an elongate member closing the heelward end of said groove and biased out of the groove at an angle extending heightwise and heelwardly of the insole bottom, said member being depressed into said groove by the insole upon engagement with the nozzle whereby the length of the groove through which adhesive is extruded is varied according to the size of the shoe being operated upon.
 2. A machine according to claim 1 in which the nozzle is provided with a groove which extends heelwardly beyond the ball area of the insole bottom where the generally flat forepart curves heightwise toward the heel end of the shoe and depression of said member by the insole closes the heelward end of said groove at said ball area.
 3. A machine according to claim 1 in which the nozzle is provided with a groove which extends around the forepart of the insole and heelwardly beyond the ball area at opposite sides of the insole and elongate members are provided in the heelward ends of the groove whereby depression of said members into said groove by the insole closes the heelward ends of said groove at said ball area where the generally flat forepart of the insole curves heightwise toward the heel end of the shoe.
 4. A machine according to claim 1 in which the elongate member comprises a resilient strip secured at one end to the bottom of the groove and having the other end extending heightwise and heelwardly out of the open side of the groove. 